diff --git a/requirements.txt b/requirements.txt
index 565d248..5e3a3bf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,6 +15,6 @@ pycparser==2.20
 pyOpenSSL==19.1.0
 requests==2.23.0
 six==1.14.0
-urllib3==1.25.8
+urllib3==1.26.5
 Werkzeug==1.0.0
 zulip==0.6.3